JPS62295524A - オ−バサンプリング・エコ−除去器 - Google Patents
オ−バサンプリング・エコ−除去器Info
- Publication number
- JPS62295524A JPS62295524A JP9765487A JP9765487A JPS62295524A JP S62295524 A JPS62295524 A JP S62295524A JP 9765487 A JP9765487 A JP 9765487A JP 9765487 A JP9765487 A JP 9765487A JP S62295524 A JPS62295524 A JP S62295524A
- Authority
- JP
- Japan
- Prior art keywords
- echo
- memory
- signal
- bits
- echo canceller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000002123 temporal effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000002592 echocardiography Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006993 memory improvement Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
- H04B3/231—Echo cancellers using readout of a memory to provide the echo replica
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Bidirectional Digital Transmission (AREA)
- Dc Digital Transmission (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US85464786A | 1986-04-22 | 1986-04-22 | |
| US854647 | 1986-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62295524A true JPS62295524A (ja) | 1987-12-22 |
Family
ID=25319237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9765487A Pending JPS62295524A (ja) | 1986-04-22 | 1987-04-22 | オ−バサンプリング・エコ−除去器 |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0243033A1 (de) |
| JP (1) | JPS62295524A (de) |
| CN (1) | CN87103094A (de) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4605826A (en) * | 1982-06-23 | 1986-08-12 | Nec Corporation | Echo canceler with cascaded filter structure |
| GB2123259A (en) * | 1982-06-25 | 1984-01-25 | Philips Electronic Associated | Digital duplex communication system |
-
1987
- 1987-04-07 EP EP87303025A patent/EP0243033A1/de not_active Withdrawn
- 1987-04-22 CN CN198787103094A patent/CN87103094A/zh active Pending
- 1987-04-22 JP JP9765487A patent/JPS62295524A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN87103094A (zh) | 1987-11-04 |
| EP0243033A1 (de) | 1987-10-28 |
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